ColumnConfig

Column configuration for React applications.

Extends the base ColumnConfig with renderer and editor properties that accept React render functions returning JSX.

Example

import type { GridConfig, ColumnConfig } from '@toolbox-web/grid-react';

const columns: ColumnConfig<Employee>[] = [
  { field: 'name', header: 'Name' },
  {
    field: 'status',
    header: 'Status',
    renderer: (ctx) => <StatusBadge value={ctx.value} />,
    editor: (ctx) => (
      <StatusSelect
        value={ctx.value}
        onCommit={ctx.commit}
        onCancel={ctx.cancel}
      />
    ),
  },
];

Properties

Property	Type	Description
field	unknown & string	Unique field key referencing property in row objects
header?	string	Visible header label; defaults to capitalized field
type?	ColumnType	Column data type.
width?	string | number	Column width in pixels; fixed size (no flexibility)
minWidth?	number	Minimum column width in pixels (stretch mode only); when set, column uses minmax(minWidth, 1fr)
sortable?	boolean	Whether column can be sorted
resizable?	boolean	Whether column can be resized by user
sortComparator?	(a: any, b: any, rowA: TRow, rowB: TRow) => number	Optional custom comparator for sorting (a,b) -> number
options?	object[] | () => object[]	For select type - available options
multi?	boolean	For select - allow multi select
format?	(value: any, row: TRow) => string	Formats the raw cell value into a display string.
meta?	Record<string, unknown>	Arbitrary extra metadata
externalView?	object	External view spec (lets host app mount any framework component)
hidden?	boolean	Whether the column is initially hidden
lockVisible?	boolean	Prevent this column from being hidden programmatically
cellClass?	(value: unknown, row: TRow, column: ColumnConfig<TRow>) => string | string[]	Dynamic CSS class(es) for cells in this column. Called for each cell during rendering. Return class names to add to the cell element.
editable?	boolean	Whether the field is editable (enables editors). Requires EditingPlugin.
editorParams?	EditorParams	Configuration parameters for built-in editors. Shape depends on column type (NumberEditorParams, TextEditorParams, DateEditorParams, SelectEditorParams). Requires EditingPlugin.
nullable?	boolean	Whether this column allows null values. Requires EditingPlugin.
filterable?	boolean	Whether this column can be filtered (only applicable when FilteringPlugin is enabled).
filterParams?	FilterParams	Configuration for the filter UI (only applicable when FilteringPlugin is enabled). For number columns: { min, max, step } For date columns: { min, max } (ISO date strings) Falls back to editorParams if not set.
filterValue?	(value: unknown, row: any) => unknown	Custom value extractor for filtering. Use this when the cell value is a complex type (e.g., an array of objects) and the filter should operate on derived primitive values instead.
group?	string | object	Column group assignment for the GroupingColumnsPlugin. Columns with the same group.id are rendered under a shared header.
pinned?	PinnedPosition	Pin column to an edge of the grid.
sticky?	PinnedPosition	⚠️
printHidden?	boolean	Hide this column when printing (default: false). Use this to exclude interactive or less important columns from print output.
renderer?	(ctx: CellRenderContext<TRow>) => ReactNode	React component renderer for cell display. Receives cell context and returns a React node (JSX).
editor?	(ctx: ColumnEditorContext<TRow>) => ReactNode	React component editor for cell editing. Receives editor context with commit/cancel functions and returns a React node (JSX).
headerRenderer?	(ctx: HeaderCellContext<TRow>) => ReactNode	React component header renderer for full header cell control. Receives header cell context and returns a React node (JSX).
headerLabelRenderer?	(ctx: HeaderLabelContext<TRow>) => ReactNode	React component header label renderer for customizing just the label portion. Receives header label context and returns a React node (JSX).

Property Details

type

Column data type.

Built-in types: 'string', 'number', 'date', 'boolean', 'select'

Custom types (e.g., 'currency', 'country') can have type-level defaults via gridConfig.typeDefaults or framework adapter registries.

Default: Inferred from first row data

---

format

Formats the raw cell value into a display string.

Used both for cell rendering and the built-in filter panel:

• In cells, the formatted value replaces the raw value as text content.
• In the filter panel (set filter), checkbox labels show the formatted value instead of the raw value, and search matches against the formatted text.

The row parameter is available during cell rendering but is undefined when called from the filter panel (standalone value formatting). Avoid accessing row properties in format functions intended for filter display.

// Currency formatter — works in both cells and filter panel
{
  field: 'price',
  format: (value) => `$${Number(value).toFixed(2)}`,
}

// ID-to-name lookup — filter panel shows names, not IDs
{
  field: 'departmentId',
  format: (value) => departmentMap.get(value as string) ?? String(value),
}

---

cellClass

// Highlight negative values
cellClass: (value, row, column) => value < 0 ? ['negative', 'text-red'] : []

// Status-based styling
cellClass: (value) => [`status-${value}`]

// Single class as string
cellClass: (value) => value < 0 ? 'negative' : ''

---

editorParams

{ field: 'price', type: 'number', editable: true, editorParams: { min: 0, max: 1000, step: 0.01 } }

---

nullable

Whether this column allows null values. Requires EditingPlugin.

When true:

• Text/number editors: clearing all content commits null.
• Select editors: a “(Blank)” option is automatically prepended that commits null. The label defaults to "(Blank)" and can be overridden via SelectEditorParams.emptyLabel.
• Date editors: clearing the date commits null.

When false:

• Text editors: clearing commits "" (empty string).
• Number editors: clearing commits editorParams.min if set, otherwise 0.
• Select editors: no blank option is shown, forcing a selection.
• Date editors: clearing commits editorParams.default if set, otherwise today’s date. The fallback preserves the original type (string → "YYYY-MM-DD", Date → new Date()).

When omitted (default), behaviour matches false for text/number columns and no special handling is applied.

Custom editors can read column.nullable from the ColumnEditorContext to implement their own nullable behaviour.

Default: false

columns: [
  { field: 'nickname', editable: true, nullable: true },
  { field: 'department', type: 'select', editable: true, nullable: true,
    options: [{ label: 'Engineering', value: 'eng' }, { label: 'Sales', value: 'sales' }] },
  { field: 'price', type: 'number', editable: true, nullable: false,
    editorParams: { min: 0 } }, // clears to 0
  { field: 'startDate', type: 'date', editable: true, nullable: false,
    editorParams: { default: '2024-01-01' } }, // clears to Jan 1 2024
]

---

filterable

Default: true

---

filterValue

Custom value extractor for filtering. Use this when the cell value is a complex type (e.g., an array of objects) and the filter should operate on derived primitive values instead.

The function receives the raw cell value and the full row, and should return either a single filterable value or an array of filterable values. When an array is returned, each element becomes an individual entry in the filter panel’s unique values list. During filtering:

• notIn (set filter): row is hidden if ANY extracted value is in the excluded set
• in (set filter): row passes if ANY extracted value is in the included set

// Array-of-objects column: extract individual names for filtering
{
  field: 'sellers',
  filterValue: (value) =>
    (value as { companyName: string }[])?.map(s => s.companyName) ?? [],
  format: (value) => (value as { companyName: string }[])?.map(s => s.companyName).join(', ') ?? '',
}

---

printHidden

columns: [
  { field: 'name', header: 'Name' },
  { field: 'actions', header: 'Actions', printHidden: true }, // Hidden in print
]

---